Method hex

src/helpers/parser.js:47–49

(ch)

    static buildMessage(expected, found) {
        function hex(ch) {
            return ch.codePointAt(0).toString(16).toUpperCase();
        }

        const nonPrintable = Object.prototype.hasOwnProperty.call(RegExp.prototype, "unicode")
            ? new RegExp("[\\p{C}\\p{Mn}\\p{Mc}]", "gu")